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E, w. GRAEF. TEMPERATURE CONTROLLING APPARATUS.

APPLICATION FILEI5 MAY I, I919.

1 ,43 1 ,224, I Patented Oct. 10, 1922.,

2 SHEETS-SHEET I.

We re/afar E. W. GRAEF.

TEMPERATURE CONTROLLING APPARATUS.

APPLICATION FILED MAY1,19I9.

1,43 1,224. I Patented 10, 1922.

2 sHEETS-sHEET 2.

Patented Oct. 10, 1922.

,uulrso srarss PATENT OFFICE.

nnnnsr w. (menu, orcn nnwnnn, New anasnY, risers-non t orwoonrannnnnwYear:

TO HENRY J. GAISMAN,

TEMPERATU'BE-GONTROLLING APPARATUS.

Amilicationfiled May 1. .1919. Serial No. 294,121.

To all whom it may concern: 7

Be it known that I, Enuns'r 5W. GRAEF, a citizenof the United States,and resident of Caldwell, in the county of Essex and State or NewJersey,have invented certaln new and useful Improvements inTemperatuI'e- Controlling Apparatus,'ot which the following is aspecification.v

My invention relates to means f0rcontrolling the temperature of airentering a carbureter for the production of the mixture requiredforinternal combustion engines in accordance with the extent or throttle0pen- 111%. H; I I

i in carrying out my invention I provlde means to admit heated or coldair to the earbureter in conjunction withv means cooperative with thecarburetor throttle adapted to prevent the admission of cold air andadmitheated'air only to the carbureter during the first portion of themovement of the throttle relatively to its closed position, and toprevent the admission of heated air and permit the admission of cold aironly to the, carbureter during the last portion of the movement of thethrottle relatively'to itsfully open position, and to permit theadmission to the carbureter 01" a mixture of heated and cold air-,whe'nthe throttle is in position between such extremes.

iediat'e running and to deliver cold, air to thecarbureter for h1ghspeed work of the engine, whereby to effect smooth running atall enginespeeds, enabling the use of lowgrade fuel when desired.

My invention further COIHPZlSGS novel details of improvement andcombinations of parts that will be more fully herelnaiter set a pipe 11.jl have shown the seats 9 and 14 Earth and then pointed out intheclaims.

Reference is to be had to the accompanying drawings forming part-hereofwherein Figure l is aside elevation illustrating my improvements appliedin connection simultaneously In the arrangement Cll'S- with aninternalcombustion engine;

Fig. 2 is an enlarged section on the line 2-2inFig.l;-

3 is a partly of apart ofthe mechanism shown in Fig. 1; Fig. 4 is avertical section substantially on the line 4.-4 invFig. 1; i I v Fig. 5is a detail of partoi Fig. l-;- I p 6 is a detail section, substantiallyon By means of my improvement I am enabled to deliver broken perspectiveviewthe line'G-[G in Fig. 7 illustrating the valve to control the flowto the carbureter';

Fig? is asection substantially on the line'7s7 of Fig.6; and, a

Fig. 8 is a detail plan view of a portion ofthe carbureter with part-ofmy improve? ments.

Similar numerals of reference indicate corresponding parts in theseveral views.

At l is indicated an internal combustion engine provided with. anexhaust manifold 2 and with ainixture intake manifold 3 connected withcarbureter 4, which parts may be of any'ordinary or suitableconstruction. At 5is casing, or so-calledstove for heating the airforthe carbureter shown applied to the exhaust manifold 2'and which maybe held thereon by screws 6 or in any suitable manner, Thecasing-orstove is'shown pro vided with means at 7, such as openings opposingmanifold 2, to; admit air to the interior ofsaidcasing or stove forheating air therein by means of its thermal relation to the hotexhaustmanifold, The casing 5; is provided withna port 8' having a valve seat 9communicating with a housing or chamber 10 to which the pipe 11 is attshed, which pipe leads to the air intake of the carbureter indicated at12, to supply air to the carbureter mixing chamber in a well knownmanner. Heated alr Wlll flow from the casing or stove 5 through port 8into .fiow solel or commin 'led with heatedair.

through pipe 1-]. to the carbureter. Valve means are indicated at 15 forcontrolhng the flow of air through the ports 81and13 to disposed inspaced relation in such a manner that the valve means 15 may closeeither of said ports, but not both at once, and may permit both ofsaidfports to be opened In the example illustrated I provide meanseo-operativebetween thethrottle and shaft 16 to permit said throttle tobe opened a suitable distance from its closed position while the valve15 is away from seat 9 and against seat 14 for admitting heated air tothe carbureter and to prevent admission of. cold air to the carbureter,and to move the valve 15 with the throttle from its last named partiallyopen position during a portion of its movement with respect to its fullopenposition until a desired point of opening has been reached towardits full open position, whereupon the valve 15 will close against seat 9and prevent admission of heated air to the earbureter but'allow fulladmission only of cold or unheated air thereto. When the throttle is inintermediate positions the valve 15 will be in a position more or lessnear either the seat 14 or the seat 9 to vary the admission of heatedand cold air to the carbureter, so that a mixture of heated means forsuch purpose being as follows:

To shaft 16 is attached a resilient or spring-acting member 20, whichmay be in the form of a spring wire, shown attached by means of a screw21 to a collar 22 secured by screw 28 to shaft 16, the lower end ofwhich spring member is operatively'connected with throttle arm or handle19 by engagement with connecting member 24, as shown having a slot 25,receiving member 29, said member 24 being shown provided with dependingpins or projections 26 cooperative with the spaced members of arm 19.The pins 26 are shown located in the joints between said spaced membersfor r0- tation by the latter. -Member-24 is shown provided with a bore24 looselyreceiving the lower end of shaft 16 whereby the former isguided and may have movement relatively to and independently of thelatter; The valve '15 is thus adapted to be actuated with throttle 18,through the medium of the spring-member 20, when valve 15is off one ofthe seats 9 or 14, and the throttle may have continued movement towardclosed or open position, respectively, when valve 15 is upon such seat.The space between the valve seats 9 and 14 with respect to thecorresponding dimensions of valve 15 is such,

spring-member 20 will bend to permit con-- tinued closing movement ofthe throttle to fully closed position, and said spring-member 20 withthrottle arm 19 and head 24 until valve 15 bears against seat 9 to shut.oil heated air during which time port 13 is gradually opened toadmiteold outside air to casing 10 and correspondingly heated air is cutoff from such casing. When valve 15 closes port 9, as stated,'heated airfrom the casing or stove '5 will be shut off from pipe 11 during furtheropening of throttle 18 thereby admitting only cold air to thecarburetor. Reverse operations occur during reverse movement of thethrottle, that is to say, when the throttle is moved from wide openposition the spring-member 20 will retain valve 15 against seat 9 forthe'previously described movement of the throttle, and when suchposition is reached tension of member- 20 will be relieved from valve 15and said member will carry said valve along with the throttle causing,gradual opening of port 9 and admit heated airto casing 10 and pipe 11,while said valve gradually moves toward seat 14 to reduce the inflow ofcold air to pipe 11 until valve 15 bears against seat '9, where thetension of the spring-member will hold said valve during continuedclosing of the throttle, thereby admitting only heated air throughcasing 10 andpipe 11 to the earbureter. It thus will be understood thatwhen the throttle is only partly opened heated air only will be admittedto pipe 11, that when the throttle is correspodingly nearly wide opencold air only from the outside will be admitted to pipe 11, and thatbetween such extremes (that is when the valve 15 is oft its seats) bothheated air and cold airwill be simultaneously admitted to casing 10 andpipe 11 for the earbureter, in proportion to the distance of valve 15,from seat 9 or seat 14,

for tempering the air admitted to the carbureter.

lily improvements give the advantage of enabling heated air to beadmitted to the carbureter while the engine is idling or running slowlyfor the production of a,

'miXture having a proper'tem'perature for economical and smooth engineoperation with relatively small volume of mixture in the cylinders, andthen the temperature of such air will be modified, at what may be termedthe middle range of opening of the throttle, whereby increased volume ofmixture is admitted to the cylinders and the temperature thereof ismodified by reason of the admission of fresh cold air.com-' mingled withheated air in ratio propor tional to the positlon of the valve 15 withsion-pressure temperature therein will not be unduly increased withlarge or full vol.-

ume of mixture in the cylinders. In other words, by means of myimprovements am enabled to cause the air entering the carbureter to haveits temperature proportioned to the compression-pressure temper atureresulting from the volume of mixture in the cylinders according to workand load conditions, whereby the mixture will. not be over heated athigh engine speed, thereby to prevent pro-ignition in the cylinders,

and whereby at other engine speeds the requisite temperature of the airfor the mixture may be obtained to produce smooth and economical engineoperation.

One of the advantages of the construction shown respecting thedetachable connection between shaft 16 and the throttle isthat thecarbureter may be disconnected from shaft 16 without disturbing thelatter, and shaft 16 with the casing 10, or the latter with casing 5,may be disconnected from the carbureter without disturbing the latter.the application to existing engine and carbureter installations of myinvention with-' 16 as well as the coincident rotation of the two.

While valve 15 is shown in a single piece of material having faces toco-operate with seats 9 and 14, it will be understood that the same maybe made in two separate parts attached to shaft 16.

My invention is not limited to the details of construction andarrangement of parts set forth as they may be changed and modifiedwithin the scope of the appended claims without departing from thespirit of my invention.

Having thus described my invention, what I claim and desire to secure byLet ters Patent is 1. The combination of a carbureter having a throttleand means to supply heated air and cold air to the carbureter, withmeans co-operative with the throttle and with respect to said air-supplymeans permitting heated air only to be admitted to the carbureter duringa certain portion of the throttle movement and permitting com- -minglingof cold air withthe heated air The construction described enables' durina farther or'tion of thethrottle b movement.

2. .The combination mg a throttle and means for supplying heated air andcold air to the carbureter I w u with means co-operative with thethrottle and w th respect to said airesupply means permitting heated aironly to be admltted to the carbureter during a certain aortion of thethrottle movement adjacent to its. closed position and permitting theilClIJJlS- sion of cold air only to the carbureter during approximatelywide open position of the throttle.

The combination of a carhureter having a throttle and means to supplyheated air and cold air to the carbureter, with valve means to controlthe admission of heated and cold air to the carburetor, and means(Jo-operative between said valve means and said throttle to cause theadmission to the carbureter of heated air only, during a portion of themovement of the throttle and cold air only during another portion of themovement of the throttle and permitting the admission to the carbureterof cold and hot air during a different por tion of the movement of thethrottle.

4;. The combination of a carbureter having a throttle, means to supplyheated air and cold air to the carbureter, ports respectively to ad mitheated and cold air to the carbureter, valve means to control said portsadapted to permit one port only to be open at a time or both ports opensimultaneously, and means cc-operative withthe throttle and said valvemeans permitting the latter to close one or the other of said portsdurof a carbureter hav-z' ing a portion of the movement of the throttleand to permit both of said ports to be open during another portion ofthe adapted to permit one port only to be open at a time or both portsopen simultaneously, and resilient means co-operativewith the throttleand said valve means to cause the latter to operate with the throttleduring certain portions of its movement and to cause said valve means toclose one or the other of said ports during different movements of saidthrottle 'to admit heated or cold air only to the carbureter duringoneor the other of. the last named movements of the throttle.

6. The combination of a carbureter having a throttle and means to supplyheated air and cold air to the carbureter with valve means to controlthe admission of heated and cold air to the carbureter, a shaft foroperating her connected with said shaft, and means operativelyconnecting said spring-acting member with the throttle to cause movementof the shaft with the throttle and to permit independent movement of thethrottle when the valve means closes the admission of heated or'cold airto the carbureter.

7. The combination of a carbureter having a throttle, means to supplyheated air and cold air to the carbureter, ports respectively to admitheated and cold air to the carbureter, valve means to control said portsadapted to permit one port only to be open at a time or both ports opensimultaneously, a shaft for operating said valve means, a spring-ratingmember connected with said shaft, a connecting member co=operative withsaid shaft and with said spring-acting member, and means to connect saidconnecting member with the throttle for causing operation of said shaftby the spring. memher the latter being adapted to permit the throttle tomove when the valve means closes one or the other of said ports.

8. The combination of a carbureter ha ing athrottle, means to supplyheated air and cold air to the carbureter, ports respect tively to admitheated and cold air to the carbureter, valve means to control said portsadapted to permit one port only to be open at a time or both ports opensimultaneously, a shaft for operating. said valve means, a spring-actingmember connected with said shaft, a connecting member having a boreloosely receiving said shaft and having means co-operative with saidspring mem her, said connecting member having means to be detachablyconnected with the throttle 'Whereby the throttle may move said valvemeans for a distanceto cause the latter to co-operate with one or theother of said ports and whereby said spring'means will permitindependent movement of the throttle when the valve means closes one ofsaid ports;

9. The combination of an internal combustion engine having exhaust andinlet mit the latter'to open one of said ports at a time.

10. The combination of an internal combustion engine having exhaust andinlet manifolds, an air heating casing in thermal relation to saidexhaust manifold, a housing having a port communicating with said casingand a port communicating with atmospheric air, valve means in saidhousing adapted to close one or the other of said ports only at onetime, and a carbureter communicating with the intake manifold, saidcarbureter having a throttle, and resilient-acting means connecting thethrottle with. the valve means to permit the throttle to have continuedmovement after the valve means closes one of saidports.

11. The combination of an internal combustion engine having exhaust andinlet manifolds, an air heating casing in thermal relation to saidexhaust manifold, a housing on said casing having a port leading toatmosphere and a port spaced from the first Ira-med port communicatingwith said casin a valve operative between said ports to close eitherport without closing the other port, a

carbureter communicating with the inlet manifold and with said housing,said carburete'r having a throttle, and resilient acting meansconnecting the throttle with the valve to move the latter with thethrottle and permit the throttle to continue to move independently ofthe valve after the latter has closed one of said ports, said resilientacting aneans maintaining said valve in the 12. The combination of acarbureter having a throttle, a-casi-ng to'supply heated air for thecarbureter, a housing associated with the casing, a port providingcommunication between the housing and casing, the casing having a portspaced from the first named port, a valve between said ports to closeone of said ports only at one time, a conduit con.- necting thecarbureter with said' housing, and means cooperating between thethrottle and said valve for operating the valve with the throttle, andcomprising means to permit the throttle to move independentl of thevalve when the latter closes one o the said ports.

Signed at New York in' the county of New York and State of New York this30th day of April A. D. 1919.

ERNEST'VV. GRAEF.

